How to save changes on pendrive("remake" image of filesys )

[laedrus]

Hello there,

I'm in need of somehow, remake the image of ramdisk for example, and copy it back to the pendrive. Why? Well i just wanna
#apt-get install nmap

And do it once, rewrite the image (that is in the pendrive) and next boot nmap will be just on the fly =)

I was searching for something here before posting, and i found remastersys. Maybe it helps, but i'm sure that isn't the "closed solution" yet, maybe helps a lot, but if does what i read, just makes the ISO.

Maybe the Mint guys have developed some tool like that, if not, i can try =)

Just to know if there's some tool like that around it. it would be wonderful to "customize" with your packages, and just save all the stuff into the pendrive =)

Thanks!